Email-verification probe domain

This domain is one of the probe domains operated by MailTester Ninja, a real-time email verification service that checks whether an email address exists before a message is sent.

Operator: Unlimited & Limited · www.mailtester.ninja

Abuse & enquiries: contact@mailtester.ninja

Privacy & purpose. MailTester Ninja uses no database and stores no email address. Every check is performed in real time and no personal data is retained, in compliance with the GDPR.

The service exists to help organisations keep their email lists clean: by confirming that an address exists before anything is sent to it, it prevents messages to invalid, mistyped or abandoned mailboxes. This reduces wasted bandwidth and server load across the mail ecosystem, protects sender reputation and deliverability, and lowers the needless energy use and CO₂ emissions caused by traffic that would never reach a real recipient. These domains run verification probes only and never send marketing or bulk email.